9
C. Gerhardt GmbH & Co. KG
3.3. Structural components and parts of front- and rear view
3.3.1. Front view
1 Quick clamping device with wedge
Digestion glass can be pressed to connection piece safely and securely. Press down the quick
clamping device in order to insert digestion tube.
2 Kjeldatherm digestion tube
Special glass with cut
100/250 ml or flask with enlarged neck 250/500/750 ml or KDD 400/800 ml.
3 Holder for steam inlet tubing
If no digestion tube is attached the tubing can be fixed here instead.
4 PTFE-inlet tubing, steam
Steam, water for dilution, and the suction of the sample residues passes through here. Please
regularly check that the opening of the PTFE-tube is not blocked by crystallisation.
5 Ventilation valve
During and after distillation the ventilation valve prevents suck back of the receiver solution into
the condenser.
6 Viton-cone, macro or micro
The stopper ensures a perfect fit to the digestion tubes.
7 Screw cap GL 18 with silicone/PTFE seal
8 PTFE-inlet tubing, NaOH
Sodium hydroxide solution enters here.
9 PP-Distributor with PP-threaded joint
10 Distribution head
The inlet tubing for steam and sodium hydroxide solution pass through the distribution head.
They are secured with screw caps (pos. 7). The distribution head prevents contamination of
the distillate by the sample.
11 Screw cap GL 32 with silicone/PTFE seal
12 Distillation condenser
A combination of a bulb condenser and a coiled condenser acc. to Dimroth which provides in-
ten-sive cooling capacity.
13 Screw cap GL 14 with plastic screw connection
14 Touch Sensitive Screen
See chapter 5 "Programming of the System"
15 Key pad, chemical resistant
See chapter 5 "Programming of the System"
16 Mains switch, green, illuminated
Turns the equipment on or off
17 Tube for ventilation valve
Connection tube to the ventilation valve
DESCRIPTION OF THE EQUIPMENT
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